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NetBSD/sys/dev/raidframe/rf_threadstuff.h

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/* $NetBSD: rf_threadstuff.h,v 1.1 1998/11/13 04:20:35 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland, Daniel Stodolsky, Jim Zelenka
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* threadstuff.h -- definitions for threads, locks, and synchronization
*
* The purpose of this file is provide some illusion of portability.
* If the functions below can be implemented with the same semantics on
* some new system, then at least the synchronization and thread control
* part of the code should not require modification to port to a new machine.
* the only other place where the pthread package is explicitly used is
* threadid.h
*
* this file should be included above stdio.h to get some necessary defines.
*
*/
/* :
* Log: rf_threadstuff.h,v
* Revision 1.38 1996/08/12 22:37:47 jimz
* add AIX stuff for user driver
*
* Revision 1.37 1996/08/11 00:47:09 jimz
* make AIX friendly
*
* Revision 1.36 1996/07/23 22:06:59 jimz
* add rf_destroy_threadgroup
*
* Revision 1.35 1996/07/23 21:31:16 jimz
* add init_threadgroup
*
* Revision 1.34 1996/07/18 22:57:14 jimz
* port simulator to AIX
*
* Revision 1.33 1996/07/15 17:22:18 jimz
* nit-pick code cleanup
* resolve stdlib problems on DEC OSF
*
* Revision 1.32 1996/06/17 03:01:11 jimz
* get rid of JOIN stuff
*
* Revision 1.31 1996/06/14 23:15:38 jimz
* attempt to deal with thread GC problem
*
* Revision 1.30 1996/06/11 18:12:36 jimz
* get rid of JOIN operations
* use ThreadGroup stuff instead
* fix some allocation/deallocation and sync bugs
*
* Revision 1.29 1996/06/11 13:48:10 jimz
* make kernel RF_THREAD_CREATE give back happier return vals
*
* Revision 1.28 1996/06/10 16:40:01 jimz
* break user-level stuff out into lib+apps
*
* Revision 1.27 1996/06/10 11:55:47 jimz
* Straightened out some per-array/not-per-array distinctions, fixed
* a couple bugs related to confusion. Added shutdown lists. Removed
* layout shutdown function (now subsumed by shutdown lists).
*
* Revision 1.26 1996/06/09 02:36:46 jimz
* lots of little crufty cleanup- fixup whitespace
* issues, comment #ifdefs, improve typing in some
* places (esp size-related)
*
* Revision 1.25 1996/06/05 18:06:02 jimz
* Major code cleanup. The Great Renaming is now done.
* Better modularity. Better typing. Fixed a bunch of
* synchronization bugs. Made a lot of global stuff
* per-desc or per-array. Removed dead code.
*
* Revision 1.24 1996/05/30 11:29:41 jimz
* Numerous bug fixes. Stripe lock release code disagreed with the taking code
* about when stripes should be locked (I made it consistent: no parity, no lock)
* There was a lot of extra serialization of I/Os which I've removed- a lot of
* it was to calculate values for the cache code, which is no longer with us.
* More types, function, macro cleanup. Added code to properly quiesce the array
* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
* before. Fixed memory allocation, freeing bugs.
*
* Revision 1.23 1996/05/20 19:31:54 jimz
* add atomic debug (mutex and cond leak finder) stuff
*
* Revision 1.22 1996/05/20 16:24:49 jimz
* get happy in simulator
*
* Revision 1.21 1996/05/20 16:15:07 jimz
* switch to rf_{mutex,cond}_{init,destroy}
*
* Revision 1.20 1996/05/18 19:51:34 jimz
* major code cleanup- fix syntax, make some types consistent,
* add prototypes, clean out dead code, et cetera
*
* Revision 1.19 1996/05/09 17:16:53 jimz
* correct arg to JOIN_THREAD
*
* Revision 1.18 1995/12/12 18:10:06 jimz
* MIN -> RF_MIN, MAX -> RF_MAX, ASSERT -> RF_ASSERT
* fix 80-column brain damage in comments
*
* Revision 1.17 1995/12/06 15:15:21 root
* added copyright info
*
*/
#ifndef _RF__RF_THREADSTUFF_H_
#define _RF__RF_THREADSTUFF_H_
#include "rf_types.h"
#define rf_create_managed_mutex(a,b) _rf_create_managed_mutex(a,b,__FILE__,__LINE__)
#define rf_create_managed_cond(a,b) _rf_create_managed_cond(a,b,__FILE__,__LINE__)
#define rf_init_managed_threadgroup(a,b) _rf_init_managed_threadgroup(a,b,__FILE__,__LINE__)
#define rf_init_threadgroup(a) _rf_init_threadgroup(a,__FILE__,__LINE__)
#define rf_destroy_threadgroup(a) _rf_destroy_threadgroup(a,__FILE__,__LINE__)
int _rf_init_threadgroup(RF_ThreadGroup_t *g, char *file, int line);
int _rf_destroy_threadgroup(RF_ThreadGroup_t *g, char *file, int line);
int _rf_init_managed_threadgroup(RF_ShutdownList_t **listp,
RF_ThreadGroup_t *g, char *file, int line);
#ifndef SIMULATE /* will null all this calls */
#ifndef KERNEL
#if defined(__osf__) || defined(AIX)
#include <pthread.h>
#endif /* __osf__ || AIX */
#define RF_DEBUG_ATOMIC 0
#if RF_DEBUG_ATOMIC > 0
#define RF_ATENT_M 1
#define RF_ATENT_C 2
typedef struct RF_ATEnt_s RF_ATEnt_t;
struct RF_ATEnt_s {
char *file;
int line;
pthread_mutex_t m;
pthread_cond_t c;
int type;
int otype;
RF_ATEnt_t *next;
RF_ATEnt_t *prev;
};
#define RF_DECLARE_MUTEX(_m_) RF_ATEnt_t *_m_;
#define RF_DECLARE_STATIC_MUTEX(_m_) static RF_ATEnt_t *_m_;
#define RF_DECLARE_EXTERN_MUTEX(_m_) extern RF_ATEnt_t *_m_;
#define RF_DECLARE_COND(_c_) RF_ATEnt_t *_c_;
#define RF_DECLARE_STATIC_COND(_c_) static RF_ATEnt_t *_c_;
#define RF_DECLARE_EXTERN_COND(_c_) extern RF_ATEnt_t *_c_;
int _rf_mutex_init(RF_ATEnt_t **m, char *file, int line);
int _rf_mutex_destroy(RF_ATEnt_t **m, char *file, int line);
int _rf_cond_init(RF_ATEnt_t **c, char *file, int line);
int _rf_cond_destroy(RF_ATEnt_t **c, char *file, int line);
void rf_atent_init(void);
void rf_atent_shutdown(void);
#define rf_mutex_init(_m_) _rf_mutex_init(_m_,__FILE__,__LINE__)
#define rf_mutex_destroy(_m_) _rf_mutex_destroy(_m_,__FILE__,__LINE__)
#define rf_cond_init(_m_) _rf_cond_init(_m_,__FILE__,__LINE__)
#define rf_cond_destroy(_m_) _rf_cond_destroy(_m_,__FILE__,__LINE__)
#define RF_LOCK_MUTEX(_a_) {RF_ASSERT((_a_)->type == RF_ATENT_M); pthread_mutex_lock(&((_a_)->m));}
#define RF_UNLOCK_MUTEX(_a_) {RF_ASSERT((_a_)->type == RF_ATENT_M); pthread_mutex_unlock(&((_a_)->m));}
#define RF_WAIT_COND(_c_,_m_) { \
RF_ASSERT((_c_)->type == RF_ATENT_C); \
RF_ASSERT((_m_)->type == RF_ATENT_M); \
pthread_cond_wait( &((_c_)->c), &((_m_)->m) ); \
}
#define RF_SIGNAL_COND(_c_) {RF_ASSERT((_c_)->type == RF_ATENT_C); pthread_cond_signal( &((_c_)->c));}
#define RF_BROADCAST_COND(_c_) {RF_ASSERT((_c_)->type == RF_ATENT_C); pthread_cond_broadcast(&((_c_)->c));}
#else /* RF_DEBUG_ATOMIC > 0 */
/* defining these as macros allows us to NULL them out in the kernel */
#define RF_DECLARE_MUTEX(_m_) pthread_mutex_t _m_;
#define RF_DECLARE_STATIC_MUTEX(_m_) static pthread_mutex_t _m_;
#define RF_DECLARE_EXTERN_MUTEX(_m_) extern pthread_mutex_t _m_;
#define RF_DECLARE_COND(_c_) pthread_cond_t _c_;
#define RF_DECLARE_STATIC_COND(_c_) static pthread_cond_t _c_;
#define RF_DECLARE_EXTERN_COND(_c_) extern pthread_cond_t _c_;
int rf_mutex_init(pthread_mutex_t *m);
int rf_mutex_destroy(pthread_mutex_t *m);
int rf_cond_init(pthread_cond_t *c);
int rf_cond_destroy(pthread_cond_t *c);
#define RF_LOCK_MUTEX(_m_) {pthread_mutex_lock(&(_m_));}
#define RF_UNLOCK_MUTEX(_m_) pthread_mutex_unlock(&(_m_))
#define RF_WAIT_COND(_c_,_m_) pthread_cond_wait( &(_c_), &(_m_) )
#define RF_SIGNAL_COND(_c_) pthread_cond_signal( &(_c_) )
#define RF_BROADCAST_COND(_c_) pthread_cond_broadcast(&(_c_))
#endif /* RF_DEBUG_ATOMIC > 0 */
int _rf_create_managed_mutex(RF_ShutdownList_t **listp, pthread_mutex_t *m, char *file, int line);
int _rf_create_managed_cond(RF_ShutdownList_t **listp, pthread_cond_t *c, char *file, int line);
typedef pthread_t RF_Thread_t;
#ifdef __osf__
typedef pthread_addr_t RF_ThreadArg_t; /* the argument to a thread function */
#else /* __osf__ */
typedef void *RF_ThreadArg_t; /* the argument to a thread function */
#endif /* __osf__ */
typedef pthread_attr_t RF_ThreadAttr_t; /* a thread creation attribute structure */
#ifdef __osf__
#define RF_EXIT_THREAD(_status_) pthread_exit( (pthread_addr_t) (_status_) )
#else /* __osf__ */
#define RF_EXIT_THREAD(_status_) pthread_exit( (void *) (_status_) )
#endif /* __osf__ */
#define RF_DELAY_THREAD(_secs_, _msecs_) {struct timespec interval; \
interval.tv_sec = (_secs_); \
interval.tv_nsec = (_msecs_)*1000000; \
pthread_delay_np(&interval); \
}
#define RF_DELAY_THREAD_TS(_ts_) pthread_delay_np(&(_ts_))
#ifdef __osf__
#define RF_THREAD_ATTR_CREATE(_attr_) pthread_attr_create( &(_attr_) )
#define RF_THREAD_ATTR_DELETE(_attr_) pthread_attr_delete( &(_attr_) )
#endif /* __osf__ */
#ifdef AIX
#define RF_THREAD_ATTR_CREATE(_attr_) pthread_attr_init( &(_attr_) )
#define RF_THREAD_ATTR_DELETE(_attr_) pthread_attr_destroy( &(_attr_) )
#endif /* AIX */
#define RF_THREAD_ATTR_SETSTACKSIZE(_attr_,_sz_) pthread_attr_setstacksize(&(_attr_), (long) (_sz_))
#define RF_THREAD_ATTR_GETSTACKSIZE(_attr_) pthread_attr_getstacksize(_attr_)
#define RF_THREAD_ATTR_SETSCHED(_attr_,_sched_) pthread_attr_setsched(&(_attr_), (_sched_))
#define RF_CREATE_ATTR_THREAD(_handle_, _attr_, _func_, _arg_) \
pthread_create(&(_handle_), (_attr_), (pthread_startroutine_t) (_func_), (_arg_))
extern pthread_attr_t raidframe_attr_default;
int rf_thread_create(RF_Thread_t *thread, pthread_attr_t attr,
void (*func)(), RF_ThreadArg_t arg);
#define RF_CREATE_THREAD(_handle_, _func_, _arg_) \
rf_thread_create(&(_handle_), raidframe_attr_default, (_func_), (_arg_))
#else /* KERNEL */
#ifdef __NetBSD__
#include <sys/lock.h>
#define decl_simple_lock_data(a,b) a struct simplelock b;
#define simple_lock_addr(a) ((struct simplelock *)&(a))
#else
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/lock.h>
#include <kern/sched_prim.h>
#define decl_simple_lock_data(a,b) a int (b);
#endif /* __NetBSD__ */
#ifdef __NetBSD__
typedef struct proc *RF_Thread_t;
#else
typedef thread_t RF_Thread_t;
#endif
typedef void *RF_ThreadArg_t;
#define RF_DECLARE_MUTEX(_m_) decl_simple_lock_data(,(_m_))
#define RF_DECLARE_STATIC_MUTEX(_m_) decl_simple_lock_data(static,(_m_))
#define RF_DECLARE_EXTERN_MUTEX(_m_) decl_simple_lock_data(extern,(_m_))
#define RF_DECLARE_COND(_c_) int _c_;
#define RF_DECLARE_STATIC_COND(_c_) static int _c_;
#define RF_DECLARE_EXTERN_COND(_c_) extern int _c_;
#define RF_LOCK_MUTEX(_m_) simple_lock(&(_m_))
#define RF_UNLOCK_MUTEX(_m_) simple_unlock(&(_m_))
#ifdef __NetBSD__
#include <sys/types.h>
#include <sys/kthread.h>
/*
* In NetBSD, kernel threads are simply processes which share several
* substructures and never run in userspace.
*
* XXX Note, NetBSD does not yet have a wakeup_one(), so we always
* XXX get Thundering Herd when a condition occurs.
*/
#define RF_WAIT_COND(_c_,_m_) { \
RF_UNLOCK_MUTEX(_m_); \
tsleep(&_c_, PRIBIO | PCATCH, "rfwcond", 0); \
RF_LOCK_MUTEX(_m_); \
}
#define RF_SIGNAL_COND(_c_) wakeup(&(_c_))
#define RF_BROADCAST_COND(_c_) wakeup(&(_c_))
#define RF_CREATE_THREAD(_handle_, _func_, _arg_) \
kthread_create((void (*) __P((void *)))(_func_), (void *)(_arg_), \
(struct proc **)&(_handle_), "raid")
#else /* ! __NetBSD__ */
/*
* Digital UNIX/Mach threads.
*/
#define RF_WAIT_COND(_c_,_m_) { \
assert_wait((vm_offset_t)&(_c_), TRUE); \
RF_UNLOCK_MUTEX(_m_); \
thread_block(); \
RF_LOCK_MUTEX(_m_); \
}
#define RF_SIGNAL_COND(_c_) thread_wakeup_one(((vm_offset_t)&(_c_)))
#define RF_BROADCAST_COND(_c_) thread_wakeup(((vm_offset_t)&(_c_)))
extern task_t first_task;
#define RF_CREATE_THREAD(_handle_, _func_, _arg_) \
(((_handle_ = kernel_thread_w_arg(first_task, (void (*)())_func_, (void *)(_arg_))) != THREAD_NULL) ? 0 : ENOMEM)
#endif /* __NetBSD__ */
#endif /* KERNEL */
#else /* SIMULATE */
#define RF_DECLARE_MUTEX(_m_) int _m_;
#define RF_DECLARE_STATIC_MUTEX(_m_) static int _m_;
#define RF_DECLARE_EXTERN_MUTEX(_m_) extern int _m_;
#define RF_DECLARE_COND(_c_) int _c_;
#define RF_DECLARE_STATIC_COND(_c_) static int _c_;
#define RF_DECLARE_EXTERN_COND(_c_) extern int _c_;
extern int rf_mutex_init(int *m);
extern int rf_mutex_destroy(int *m);
extern int rf_cond_init(int *c);
extern int rf_cond_destroy(int *c);
int rf_mutex_init(int *m);
int rf_mutex_destroy(int *m);
int _rf_create_managed_mutex(RF_ShutdownList_t **listp, int *m, char *file, int line);
int _rf_create_managed_cond(RF_ShutdownList_t **listp, int *m, char *file, int line);
typedef void *RF_ThreadArg_t; /* the argument to a thread function */
#define RF_LOCK_MUTEX(_m_)
#define RF_UNLOCK_MUTEX(_m_)
#define RF_WAIT_COND(_c_,_m_)
#define RF_SIGNAL_COND(_c_)
#define RF_BROADCAST_COND(_c_)
#define RF_EXIT_THREAD(_status_)
#define RF_DELAY_THREAD(_secs_, _msecs_)
#define RF_THREAD_ATTR_CREATE(_attr_) ;
#define RF_THREAD_ATTR_DELETE(_attr_) ;
#define RF_THREAD_ATTR_SETSTACKSIZE(_attr_,_sz_) ;
#define RF_THREAD_ATTR_SETSCHED(_attr_,_sched_) ;
#define RF_CREATE_ATTR_THREAD(_handle_, _attr_, _func_, _arg_) ;
#define RF_CREATE_THREAD(_handle_, _func_, _arg_) 1
#endif /* SIMULATE */
struct RF_ThreadGroup_s {
int created;
int running;
int shutdown;
RF_DECLARE_MUTEX(mutex)
RF_DECLARE_COND(cond)
};
/*
* Someone has started a thread in the group
*/
#define RF_THREADGROUP_STARTED(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
(_g_)->created++; \
RF_UNLOCK_MUTEX((_g_)->mutex); \
}
/*
* Thread announcing that it is now running
*/
#define RF_THREADGROUP_RUNNING(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
(_g_)->running++; \
RF_UNLOCK_MUTEX((_g_)->mutex); \
RF_SIGNAL_COND((_g_)->cond); \
}
/*
* Thread announcing that it is now done
*/
#define RF_THREADGROUP_DONE(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
(_g_)->shutdown++; \
RF_UNLOCK_MUTEX((_g_)->mutex); \
RF_SIGNAL_COND((_g_)->cond); \
}
/*
* Wait for all threads to start running
*/
#define RF_THREADGROUP_WAIT_START(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
while((_g_)->running < (_g_)->created) { \
RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
} \
RF_UNLOCK_MUTEX((_g_)->mutex); \
}
/*
* Wait for all threads to stop running
*/
#ifndef __NetBSD__
#define RF_THREADGROUP_WAIT_STOP(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
RF_ASSERT((_g_)->running == (_g_)->created); \
while((_g_)->shutdown < (_g_)->running) { \
RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
} \
RF_UNLOCK_MUTEX((_g_)->mutex); \
}
#else
/* XXX Note that we've removed the assert. That should get put back
in once we actually get something like a kernel thread running */
#define RF_THREADGROUP_WAIT_STOP(_g_) { \
RF_LOCK_MUTEX((_g_)->mutex); \
while((_g_)->shutdown < (_g_)->running) { \
RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
} \
RF_UNLOCK_MUTEX((_g_)->mutex); \
}
#endif
#if defined(__NetBSD__) && defined(_KERNEL)
int rf_mutex_init(struct simplelock *);
int rf_mutex_destroy(struct simplelock *);
int _rf_create_managed_mutex(RF_ShutdownList_t **, struct simplelock *,
char *, int);
int _rf_create_managed_cond(RF_ShutdownList_t **listp, int *,
char *file, int line);
int rf_cond_init(int *c); /* XXX need to write?? */
int rf_cond_destroy(int *c); /* XXX need to write?? */
#endif
#endif /* !_RF__RF_THREADSTUFF_H_ */
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